CN104124481B - The charge control method of a kind of electric automobile and system - Google Patents

The charge control method of a kind of electric automobile and system Download PDF

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Publication number
CN104124481B
CN104124481B CN201310151400.8A CN201310151400A CN104124481B CN 104124481 B CN104124481 B CN 104124481B CN 201310151400 A CN201310151400 A CN 201310151400A CN 104124481 B CN104124481 B CN 104124481B
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Prior art keywords
charging
electric automobile
temperature
control unit
electronic control
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CN104124481A (en
Inventor
罗宇亮
夏珩
徐吉汉
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Guangzhou Automobile Group Co Ltd
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Guangzhou Automobile Group Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44Methods for charging or discharging
    • H01M10/441Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44Methods for charging or discharging
    • H01M10/443Methods for charging or discharging in response to temperature
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

The present invention is applicable to electric vehicle engineering field, disclosing charge control method and the system of a kind of electric automobile, wherein the method includes: step 101: the electronic control unit needed for external power supply only triggers charging electric vehicle when accessing electric automobile end charge port is in running order;Step 102: the change in voltage that electronic control unit accesses monitoring point according to external power source judges whether to need, by Vehicular charger, set of cells is carried out external charging, if it is, enter step 103, otherwise enters step 105;Step 103: judge whether electric motor car current state meets charging security strategy, if it is, enter step 104;Otherwise enter step 105;Step 104: Vehicular charger carries out external charging according to predetermined car load charged state algorithm till set of cells is full of to set of cells;Step 105: be not charged.The reliability of charge control system, safety and convenience can be substantially increased by the method and system.

Description

The charge control method of a kind of electric automobile and system
Technical field
The present invention relates to electric vehicle engineering field, more particularly, to the external charge control of a kind of plug-in electromobile Method and system processed.
Background technology
In recent years, the development of electric automobile is very swift and violent, and in general, electric automobile includes that pure electric automobile and mixing are dynamic Power automobile.Pure electric automobile is purely to be driven motor as original power by the accumulator that automobile is self-contained;Hybrid vehicle Being the vehicle constituted jointly by two or more single drivetrains that can operate simultaneously, the road horsepower of vehicle is according to actual vehicle Transport condition is separately or cooperatively provided by single drivetrain, generally comprises traditional internal combustion engine drivetrain and accumulator-motor drives System.Electric automobile is owing to using the electric power of Renewable resource as energy, so the pollution to environment is minimum, and cost is relative The cheapest.
Electric automobile is generally containing two battery modules, and one is low pressure 12 overhead accumulator, provides electricity to automotive electronics components and parts Source, another is high-voltage battery module, provides energy to high power components such as motors.General hybrid vehicle is the most permissible Do not charge from outside to high-tension battery, but realized by the internal combustion engine power plant of vehicle, need to consume fuel.And it is plug-in Hybrid power can reach electric power and separate with the cost of fuel from external charging so that reduce further with car cost.
An external charging interface is had, using the input as external power source on the car of plug-in hybrid-power automobile.External fill During electricity, household electric alternating current 220V can be used to charging on-vehicle battery by inversion module, it is also possible to by connecting special power supply system System is to charging on-vehicle battery.Plug-in electromobile is in addition to traditional CAN (Control Area Network) network, also Having a road to include the CAN network of high voltage component, shown in accompanying drawing 1, Fig. 1 is existing charging system for electric automobile ultimate principle Block diagram.Wherein BMS (Battery Management System) is battery management system, it is achieved to the state of battery (such as electricity Stream, voltage, insulation) detect and power control.ISG (Integrated Starter Generator) is that front spindle motor controls Device, it is achieved the control to front spindle motor;ERAD (Electric Rear Axle Drive) is rear axle electric machine controller, it is achieved right The control of rear spindle motor;DCDC is DC-DC Setup Controller, high-tension battery carries out low pressure conversion output to automobile-used 12V accumulator;CCS (charger control system) is Vehicular charger, it is possible to achieve alternating current is converted to HVDC It is charged to high-tension battery group.HCU (hybrid control unit) is entire car controller, mainly realizes the control to car load As vehicle mode, electromotor start and stop etc. control;ECU (Electronic Control Unit) is the Electronic Control list of low-pressure section Unit, also known as car running computer or vehicle-mounted computer, it is provided that to the voltage of each ECU can be 12V (dolly) can also be 24V (truck), on the whole, on car, the electronic controller of all 12V (or 24V) can be referred to as ECU, wherein HCU Fall within ECU.
Summary of the invention
The features and advantages of the present invention are partly stated, or can from this description it is clear that or Can learn by putting into practice the present invention.
The technical problem to be solved is: provides charge control method and the system of a kind of electric automobile, makes electronic Automobile can convenient and swift efficiently be charged in charging process, it is ensured that the safety and reliability in charging process.
Solve the technology of the present invention problem be the technical scheme is that
A kind of charge control method of electric automobile, including, step 101: external power supply only touches when accessing electric automobile end charge port Electronic control unit needed for sending out charging electric vehicle is in running order;
Step 102: the change in voltage that electronic control unit accesses monitoring point according to external power source judges whether to need to pass through Vehicular charger Set of cells is carried out external charging, if it is, enter step 103, otherwise enters step 105;
Step 103: judge whether electric automobile current state meets charging security strategy, if it is, enter step 104;Otherwise Enter step 105;
Step 104: Vehicular charger, according to predetermined car load charged state algorithm, set of cells is carried out external charging until set of cells is full of Till;
Step 105: be not charged;
Predetermined car load charged state algorithm includes: detects batteries monomer maximum voltage value in charging process, determines current charged electrical Stream threshold values, when batteries monomer maximum voltage value changes, adjusts current charging current according to pre-defined rule, and pre-defined rule is for adopting Charge to set of cells with staged electric current.
As preferred embodiment, it is judged that whether electric automobile current state meets charging security strategy includes:
Detection high voltage loop of electric automobile situation, determines and includes battery cell situation, pressure reduction, temperature, total voltage, insulation resistance value, continues Whether each situation of electrical equipment meets charging requirement;And/or
Detection electric automobile physical state, determines whether each situation of present engine, gear, inverter module, motor, speed meets Charging requirement.
As preferred embodiment, the method is additionally included in charging process will currently be charged work by outside display module State shows, charging duty include: in charging, charging complete, charge fault.
As preferred embodiment, the method also includes: detect the temperature regime of Vehicular charger in charging process, when When Vehicular charger temperature is too high, starts cooling system and Vehicular charger is lowered the temperature.
As preferred embodiment, cooling system therein is cooling water pump, when the temperature of Vehicular charger is more than the first temperature Time, with First Speed operating cooling water pump, when the temperature of Vehicular charger is more than the second temperature, with second speed operating cooling Water pump, when the temperature of Vehicular charger is more than three temperature, with third speed operating cooling water pump, when the temperature of Vehicular charger When degree is less than the first temperature, cooling water pump is in off position.
Additionally, the present invention also provides for the charge control system of a kind of electric automobile, including Vehicular charger, set of cells, electricity Sub-control unit, also includes:
Electronic control unit wake module, needed for triggering charging electric vehicle when external power supply accesses electric automobile end charge port Electronic control unit is in running order;
External power source inserts detection module, judges whether to need to be filled by vehicle-mounted for accessing the change in voltage of monitoring point according to external power source Motor carries out external charging to set of cells;
Charging security strategy judge module, is used for judging whether electric automobile current state meets charging security strategy;
Car load charged state algorithm controls module, enters set of cells according to predetermined car load charged state algorithm for controlling Vehicular charger Row external charging.
As preferred embodiment, it is connected with electronic control unit and has outside duty of currently charging is shown Portion's display module.
As preferred embodiment, it is connected with Vehicular charger and has temperature sensor and temperature chiller, temperature cooling dress It is set to cooling water pump.
As preferred embodiment, charging security strategy judge module and car load charged state algorithm controls module are integrated in electricity In sub-control unit, or it is integrated in single controller.
As preferred embodiment, electronic control unit wake module includes: automobile-used 12V power supply, the first unidirectional two poles Pipe, the second diode, electronic control unit, electronic control unit is connected with firing tip by the first diode, Electronic Control list Unit is connected with automobile-used 12V power supply by the second diode.
As preferred embodiment, external power source inserts detection module and is made up of external power source insertion detection circuit, this circuit Being connected between vehicle plug and vehicle body ground, this circuit includes: the first resistance, the second resistance, the 3rd resistance and one open Close, respectively at the second resistance and the 3rd resistant series after the first resistance and switch in parallel, wherein the second resistance and the 3rd resistance it Between, there is a voltage monitoring point, the resistance of the first resistance and the 3rd resistance is 3-5 times of the second resistance respectively.
In technical solution of the present invention, by the use of electronic control unit wake module, it is ensured that only call out in charging process Electronic control unit required for awake charging, other incoherent electronic control unit can keep resting state, decrease energy The waste of amount, by the use of the security strategy judge module that charges, can guarantee the safety in charging process completely, including Car load power safety, high-voltage safety and battery material during charging and the cooling safety of Vehicular charger.Additionally, in electronics control Other electronic control unit is effectively protected by unit wake module processed by single phasing protection device.Outside aobvious owing to employing Show module, it is provided that visual charged state shows, greatly improve intellectuality and the convenience of charging system.From car load system For the angle of system, by waking up charging up, cell safety, car load safety, cooling system, charged state shows this five aspects Substantially increase the reliability of charge control system, safety and convenience.
By reading description, those of ordinary skill in the art will be best understood feature and the content of these technical schemes.
Accompanying drawing explanation
Below with reference to accompanying drawing and combine example be specifically described the present invention, advantages of the present invention and implementation will be more Add substantially, wherein content shown in accompanying drawing is only used for explanation of the present invention, and does not constitute going up in all senses the present invention Limit, in the accompanying drawings:
Fig. 1 is electric automobile and the relevant each module annexation schematic diagram that charges in prior art.
Fig. 2 is to be applicable to the charging of technical solution of the present invention be correlated with each module annexation schematic diagram.
Fig. 3 is the method main flow chart of the present invention.
Fig. 4 is the structural principle block diagram of electronic control unit wake module.
Fig. 5 is that external power source inserts detection module theory diagram.
Fig. 6 is the specific embodiment flow chart of detection high voltage loop of electric automobile situation.
Fig. 7 is the specific embodiment flow chart of detection electric automobile physical state.
Fig. 8 is the flow chart of car load charged state algorithm.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.
As shown in Figure 2, it is adaptable to the charging of technical solution of the present invention each module of being correlated with includes: motor, electronic control unit (referred to herein generally HCU), whole vehicle state input module, set of cells, inverter, control drive module, Vehicular charger (CCS), Vehicular charger chiller, temperature sensor, display lamp, point detection signal, switch and external power source connect Mouthful, when charging is required, external AC is connected, simultaneously need to closing relay 1 (Relay1), Relay2, Relay3.? Under the control of electronic control unit, being charged process, wherein display lamp is used to refer to present charge state, during charging, forbids Car load associative operation, as hung shelves driving etc..
As it is shown on figure 3, the charge control method of a kind of electric automobile disclosed in this invention, at least comprise the following steps:
Step 101, external power supply only trigger at the electronic control unit needed for charging electric vehicle when accessing electric automobile end charge port In duty.
The change in voltage that step 102, electronic control unit access monitoring point according to external power source judges whether to need by vehicle-mounted Charger carries out external charging to set of cells, if it is not, then enter step 105.If it is, enter step 103.
Step 103: judge whether electric automobile current state meets charging security strategy, if it is, enter step 104, otherwise enter step 105.
Step 104, Vehicular charger, according to predetermined car load charged state algorithm, set of cells is carried out external charging until battery Till group is full of.
105, it is not charged.
Wherein, the Electronic Control list needed for external power supply triggers the charging of electric automobile when accessing electric automobile end charge port Unit is in running order, is because electric automobile when needs charge, is typically in suspended state, and this situation is usually pulled out Key, after vehicle locking after a period of time, on car, all of ECU all enters resting state, the most out-of-work shape State, when there being external power supply to access electric automobile end charge port, needs to activate the electronic control unit relevant to charging and stops stopping Sleep, enter duty.Complete this work usually to be completed by electronic control unit wake module, this electronic control unit As shown in Figure 4, its basic functional principle is the structure of wake module:
Exporting automobile-used 12V power supply when external power supply accesses car end charge port, this power supply is through single-phase diode 2, and output is to electronics control Unit processed (referred to herein generally HCU);If the Ignition end of car load (that is: firing tip) also provides for power supply simultaneously, Ignition end provides power supply to refer to when car key turns to ON position, and key apparatus provides power supply to turn on Ignition end, Single-phase diode 1,2 works, and will not impact two-part current source and electronic control unit, and the sense of current is 1-2- 3.By this single phasing protection device, other electronic control unit is effectively protected.
After electronic control unit is waken up, the change in voltage that electronic control unit accesses monitoring point according to external power source judges The need of by Vehicular charger, set of cells being carried out external charging, the detection whether inserted for external charging power supply is by such as Circuit realiration shown in Fig. 5, wherein, external plug contains L, N, CC tri-end, wherein CC end comprise R4, R3, S2 is connected by connected mode as depicted and vehicle body, and wherein S2 is the button on external charging plug, and this button is permissible Locking external charging plug, car load charge port to be inserted or extract and be inserted in car load charge port, it is necessary to press this pinning button ability Operation, presses and shows that S2 closes.Car load interface internal contains a pull-up circuit, by resistance R2 and power end phase Even, when outside charge power supply is not inserted into car load charge port, it is exactly internal power values that test point 4 collects magnitude of voltage;Outside After charge power supply is inserted, the magnitude of voltage of test point has greatly changed, and can identify external charging mouth by the change of magnitude of voltage Whether insert.Generally, using R2 is 5K, R3 be 1K, R4 be 4K, wherein R3 is minimum, be in order to When S2 closes, test point obtains a magnitude of voltage the biggest with primary voltage value difference, and therefore, R3 should be minimum, R2, R4 is about several times of R3 value.Need to further illustrate: ' electric automobile ' the dotted line frame in figure is that the charging on vehicle is inserted The circuit signal of mouth, ' vehicle plug ' dotted line frame refers to the internal wiring signal of charging gun, and K represents internal switch.' insert Head ' it is the other end of charging gun, for connecting the socket of domestic.R represents that resistance, S represent switch.
Step 103 judges whether electric automobile current state meets charging security strategy, in a preferred embodiment, at least Including following two aspects:
1), detect high voltage loop of electric automobile situation, determine and include battery cell situation, pressure reduction, temperature, total voltage, insulation resistance Whether each situation of value, relay meets charging requirement.
Specifically: battery cell maximum voltage is less than certain definite value;It is the most satisfied that battery cell minimum voltage is not less than certain definite value The normal voltage range of battery cell voltage;Maximum, minimum differntial pressure is less than certain definite value;Battery cell maximum temperature is less than certain Definite value;Battery cell minimum temperature is not less than certain definite value;The temperature difference is less than certain definite value;Assembled battery total voltage is less than certain definite value, It is not less than certain definite value;Insulation resistance value is not less than certain definite value;Relay is the most short-circuit, open circuit, short power supply.The state master of high-pressure system If being detected by battery management system, occurring being unsatisfactory for condition during detection, battery management system will enter fault mode.For Convenient understanding, can understand using the scheme that the flow chart of Fig. 6 is stated as a special case.Carry out high-pressure system charging safety control Detection processed includes:
Step 601: judge that insulation resistance value is not less than certain definite value 1, if it is not, then enter step 612: be judged as high-pressure system event Barrier, and enter step 613: it is charged malfunction coefficient,
If yes then enter step 602: judge that inside battery communication is the most normal, if it is not, then enter step 612: be judged as height The pressure system failure, and enter step 613: it is charged malfunction coefficient,
If yes then enter step 603: judge that battery cell maximum differential pressure is not more than certain definite value 2, if it is not, then enter step 612: be judged as high-pressure system fault, and enter step 613: be charged malfunction coefficient,
If yes then enter step 604: judge whether monomer maximum differential pressure is not less than certain definite value 3, if it is not, then enter step 612: be judged as high-pressure system fault, and enter step 613: be charged malfunction coefficient,
If yes then enter step 605: judge that monomer pressure reduction is not more than certain definite value 4, if it is not, then enter step 612: be judged as High-pressure system fault, and enter step 613: it is charged malfunction coefficient,
If yes then enter step 606: judge that battery cell maximum temperature is not more than certain definite value 5, if it is not, then enter step 612: be judged as high-pressure system fault, and enter step 613: be charged malfunction coefficient,
If yes then enter step 607: judge that battery cell maximum temperature is not less than certain definite value 6, if it is not, then enter step 612: be judged as high-pressure system fault, and enter step 613: be charged malfunction coefficient,
If yes then enter step 608: judge that battery global voltage is less than certain definite value 7, if it is not, then enter step 612: sentence Break as high-pressure system fault, and enter step 613: be charged malfunction coefficient,
If yes then enter step 609: judge that battery global voltage is not less than certain definite value 8, if it is not, then enter step 612: sentence Break as high-pressure system fault, and enter step 613: be charged malfunction coefficient,
If yes then enter step 610: judge relay whether fault-free, if it is not, then enter step 612: be judged as high pressure system System fault, and enter step 613: it is charged malfunction coefficient,
If yes then enter step 611: judge Vehicular charger whether fault, if it is terminate flow process, if it is not, then enter step Rapid 612: be judged as high-pressure system fault, and enter step 613: be charged malfunction coefficient.
2), detect electric automobile physical state, determine each shape of present engine, gear, inverter module, motor, speed Whether condition meets charging requirement.It is in closedown shape body, control including stationary vehicle, electromotor shutdown, neutral, relevant inversion module System drives module to close;Forbid that car load non-secure operations includes gear, the operation of electromotor.For convenience of understanding, can be with Fig. 7 The scheme stated of flow chart understand as a special case.Initially enter step 701: judge that car load is the most static, if It is then to enter step 702: judging whether electromotor shuts down, it's not true, enters step 702a: request electromotor is shut down, Then enter step 703 when determining and shut down and judge whether inversion module 1 closes, if it is not, enter the request of step 703a Inversion module 1 is closed, and then enters step 704 and judge whether inversion module 2 closes, as the most then entered step after confirming to close Inversion module 2 is closed in 704a request, determines that being turned off entering step 705 then judges to control to drive whether module closes, if do not had Have, then enter step 705a request close drive control module close, confirm close after, then carry out enter step 706 forbid Car load non-secure operations.
In a preferred embodiment, predetermined car load charged state algorithm includes: detect batteries monomer in charging process Big magnitude of voltage, determines current charging current threshold values, when batteries monomer maximum voltage value changes, adjusts according to pre-defined rule Current charging current, pre-defined rule charges to set of cells, specifically for using staged electric current:
In charging process, by battery cell maximum voltage value, determine current charging current threshold values, then threshold values is fed back to vehicle-mounted Charger, Vehicular charger receives the charging current threshold values of battery feedback and adjusts the current value of charging again.Simultaneously refering to Fig. 2 and Tu The flow chart of 8, when high-tension battery is charged by monomer maximum voltage less than threshold values 1, rated charge stream;When monomer maximum voltage Exceeding threshold values 1, definite value A charging current is charged to high-tension battery;Until monomer maximum voltage exceedes again threshold values 1, export definite value B charging current is charged to high-tension battery;When monomer maximum voltage exceedes again threshold values 1, then export definite value C charging current to high pressure Battery charges;Until monomer maximum voltage exceedes threshold values 1 again, last definite value D charging current is charged to high-tension battery.Until it is super Cross threshold values 1, battery charging complete.Why charged the battery by the most stepped current value, mainly consider big electric current The internal resistance meeting attrition voltage of battery cell during charging, the error caused is relatively big, and the charging of such multiple current value can progressively be reduced Error, reaches the effect of charging accurate to battery.
As shown in Figure 8, it is charged sequential and electric current controls to include: initially enter step 801 and close relay1, then enter Enter step 802 to detect relay1 and the most really close, if it is not, then continue Guan Bi relay1, if yes then enter step 803 Subsequently into step 804, Guan Bi relay2, detects whether relay2 positively closes, if it is not, then continue Guan Bi relay2, as Fruit is, enters step 805 and closes relay3, detects whether relay3 closes subsequently into step 806, if it is not, then continue If yes then enter step 807, Guan Bi relay3, judges that monomer maximum voltage, whether less than threshold values 1, walks if it is, enter Rapid 808 use rated charge stream to be charged, and use definite value 1 charging current to fill if it is not, then enter step 809 Electricity, enters back into step 810 and judges that battery cell maximum voltage, whether more than threshold values 2, uses if yes then enter step 811 and determines Value charging current is charged, and enters back into step 812 and judges whether monomer maximum voltage is more than threshold values 3, if it is, enter Step 813 uses definite value to be charged, and enters back into step 814 and judges whether monomer maximum voltage is more than threshold values 4, if it is, Then entering step 815 uses definite value 4 to be charged, if finally entering step 816 monomer maximum voltage to be more than 5, has charged Become
When charging complete or faulty generation, BMS limit the charge current to 0A, when the charging current fall of CCS feedback After 0A, request CCS disconnects Relay3 and disconnects Relay2 and Relay1 again.
Duty of currently charging being shown by outside display module in charging process, charge duty bag Include: in charging, charging complete, charge fault.Such as: if there is fault, then amber light flicker is controlled;If charged Become, then control green light Chang Liang;If charged, then control red light Chang Liang.In a word, control charged state to show and be divided into three Kind: the most charge;2. charging complete;3. charge fault.When external power source inserts the charge port on car, and display module is just opened Beginning work.Once charging complete or charging are interrupted, and display module meeting continuous firing is until exceeding certain working time length, to carry The charged state that the driver that wakes up is current.
In a preferred embodiment, charging process detects the temperature regime of Vehicular charger, when Vehicular charger temperature Time too high, start cooling system and Vehicular charger is lowered the temperature.Particularly as follows: cooling system is cooling water pump, work as vehicle-mounted charge When the temperature of machine is more than the first temperature (high temperature), with First Speed (low speed) operating cooling water pump, when the temperature of Vehicular charger When spending more than the second temperature (at higher temperature), with second speed (middling speed) operating cooling water pump, when the temperature of Vehicular charger exceedes During the 3rd temperature (highest temperature), with third speed (at a high speed) operating cooling water pump, when carrying the temperature of charger less than the first temperature When spending, cooling water pump is in off position.
Additionally, the invention also discloses the charge control system of a kind of electric automobile, including Vehicular charger, set of cells, Electronic control unit, also includes:
Electronic control unit wake module, needed for triggering charging electric vehicle when external power supply accesses electric automobile end charge port Electronic control unit is in running order;
External power source inserts detection module, judges whether to need to be filled by vehicle-mounted for accessing the change in voltage of monitoring point according to external power source Motor carries out external charging to set of cells;
Charging security strategy judge module, is used for judging whether electric automobile current state meets charging security strategy;
Car load charged state algorithm controls module, for controlling described Vehicular charger according to predetermined car load charged state algorithm to battery Group carries out external charging.
In a preferred embodiment, this system is also connected with electronic control unit to have and shows for duty of currently charging Outside display module out, is connected with Vehicular charger and has temperature sensor and temperature chiller, and temperature chiller is permissible For cooling water pump or fan.Additionally, charging security strategy judge module and car load charged state algorithm controls module can be integrated In electronic control unit, or can also be integrated in single controller.
In a preferred embodiment, electronic control unit wake module includes: automobile-used 12V power supply, the first unidirectional two poles Pipe, the second unilateral diode, electronic control unit, electronic control unit is connected with firing tip by the first unilateral diode, electricity Sub-control unit is connected with automobile-used 12V power supply by the second unilateral diode.
In a preferred embodiment, external power source inserts detection module and is made up of external power source insertion detection circuit, this circuit Being connected between vehicle plug and vehicle body ground, this circuit includes: the first resistance, the second resistance, the 3rd resistance and one open Close, respectively at the second resistance and the 3rd resistant series after the first resistance and switch in parallel, wherein the second resistance and the 3rd resistance it Between, there is a voltage monitoring point, the resistance of the first resistance and the 3rd resistance is 3-5 times of the second resistance respectively.
The technical scheme of above method and system realizes, by the use of electronic control unit wake module, it is ensured that in charging During only wake up the electronic control unit required for charging, other incoherent electronic control unit can keep dormancy shape State, decreases the waste of energy, by the use of the security strategy judge module that charges, can guarantee completely in charging process Safety, including car load power safety, high-voltage safety and battery material during charging and the cooling safety of Vehicular charger.This Outward, by single phasing protection device, other electronic control unit is effectively protected in electronic control unit wake module.Due to Employ outside display module, it is provided that visual charged state shows, greatly improves intellectuality and the facility of charging system Property.For the angle of Full Vehicle System, by waking up charging up, cell safety, car load safety, cooling system, charged state shows Show that these five aspects substantially increase the reliability of charge control system, safety and convenience, compared with prior art, embody Extremely strong superiority.
Illustrate the preferred embodiments of the present invention above by reference to accompanying drawing, those skilled in the art without departing from the scope of the present invention and Essence, can have multiple flexible program to realize the present invention.For example, as the shown partially of an embodiment or the spy of description Levy and can be used for another embodiment to obtain another embodiment.These are only the embodiment that the present invention is the most feasible, not thereby The interest field of the limitation present invention, the equivalence change that all utilization description of the invention and accompanying drawing content are made, it is both contained in the present invention Interest field within.

Claims (11)

1. the charge control method of an electric automobile, it is characterised in that including:
Step 101: external power supply only triggers at the electronic control unit needed for charging electric vehicle when accessing electric automobile end charge port In duty;
Step 102: the change in voltage that described electronic control unit accesses monitoring point according to external power source judges whether to need to be filled by vehicle-mounted Motor carries out external charging to set of cells, if it is, enter step 103, otherwise enters step 105;
Step 103: judge whether electric automobile current state meets charging security strategy, if it is, enter step 104;Otherwise Enter step 105;
Step 104: described Vehicular charger, according to predetermined car load charged state algorithm, set of cells is carried out external charging until set of cells Till Chong Maning;
Step 105: be not charged;
Described predetermined car load charged state algorithm includes: detects batteries monomer maximum voltage value in charging process, determines current filling Electricity current threshold, when described batteries monomer maximum voltage value changes, adjusts current charging current according to pre-defined rule, described Pre-defined rule charges to set of cells for using staged electric current.
The charge control method of electric automobile the most according to claim 1, it is characterised in that described judgement electric automobile is current Whether state meets charging security strategy includes:
Detection high voltage loop of electric automobile situation, determines and includes battery cell situation, pressure reduction, temperature, total voltage, insulation resistance value, continues Whether each situation of electrical equipment meets charging requirement;And/or
Detection electric automobile physical state, determines whether each situation of present engine, gear, inverter module, motor, speed meets Charging requirement.
The charge control method of electric automobile the most according to claim 1, it is characterised in that be additionally included in described charging process In by outside display module, duty of currently charging is shown, described charging duty includes: in charging, charging Complete, charge fault.
The charge control method of electric automobile the most according to claim 1, it is characterised in that also include: charged described Journey detects the temperature regime of Vehicular charger, when described Vehicular charger temperature is too high, starts cooling system to described vehicle-mounted Charger is lowered the temperature.
The charge control method of electric automobile the most according to claim 4, it is characterised in that described cooling system is cooling water Pump, when the temperature of Vehicular charger is more than the first temperature, with First Speed operating cooling water pump, when the temperature of Vehicular charger During more than the second temperature, with second speed operating cooling water pump, when the temperature of Vehicular charger is more than three temperature, with the 3rd Speed operating cooling water pump, when the temperature of Vehicular charger is less than the first temperature, described cooling water pump is in off position.
6. a charge control system for electric automobile, including Vehicular charger, set of cells, electronic control unit, its feature exists In, also include:
Electronic control unit wake module, needed for triggering charging electric vehicle when external power supply accesses electric automobile end charge port Electronic control unit is in running order;
External power source inserts detection module, judges whether to need to be filled by vehicle-mounted for accessing the change in voltage of monitoring point according to external power source Motor carries out external charging to set of cells;
Charging security strategy judge module, is used for judging whether electric automobile current state meets charging security strategy;
Car load charged state algorithm controls module, for controlling described Vehicular charger according to predetermined car load charged state algorithm to battery Group carries out external charging, and described predetermined car load charged state algorithm includes: detect batteries monomer maximum voltage in charging process Value, determines current charging current threshold values, when described batteries monomer maximum voltage value changes, adjusts according to pre-defined rule and works as Front charging current, described pre-defined rule charges to set of cells for using staged electric current.
The charge control system of electric automobile the most according to claim 6, it is characterised in that with described electronic control unit even It is connected to the outside display module for duty of currently charging being shown.
The charge control system of electric automobile the most according to claim 6, it is characterised in that be connected with described Vehicular charger Having temperature sensor and temperature chiller, described temperature chiller is cooling water pump.
The charge control system of electric automobile the most according to claim 6, it is characterised in that described charging security strategy judges Module and car load charged state algorithm controls module are integrated in described electronic control unit, or are integrated in single controller In.
The charge control system of electric automobile the most according to claim 6, it is characterised in that described electronic control unit wakes up up Module includes: automobile-used 12V power supply, the first diode, the second diode, electronic control unit, described electronic control unit Being connected with firing tip by the first diode, described electronic control unit is connected with automobile-used 12V power supply by the second diode.
The charge control system of 11. electric automobiles according to claim 6, it is characterised in that described external power source inserts detection Module is made up of external power source insertion detection circuit, and this circuit is connected between vehicle plug and vehicle body ground, and this circuit includes: the One resistance, the second resistance, the 3rd resistance and a switch, after described first resistance and described switch in parallel respectively with the second electricity Resistance and the 3rd resistant series, wherein between the second resistance and the 3rd resistance, have a voltage monitoring point, the first resistance and the 3rd The resistance of resistance is 3-5 times of the second resistance respectively.
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